November 20, 1955

Dr. Einstein,

Your time theories? TOTALLY validated, dude! I’ve visited 1955 and 2015! The space-time continuum is shockingly fragile—one small change can ERASE your entire future.

Doc Brown built a time machine using your equations. The revelation: our choices create different timeline branches! Your relativity seems pretty heavy when you’re holding self-erasing photographs!

— Marty McFly
Future Verified